/lib/udev/rules.d/80-pktsetup.rules is in udftools 2.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # Create and remove packet writing device for each optical block device
ACTION=="add", SUBSYSTEM=="block", ENV{ID_CDROM}=="1", RUN+="/usr/sbin/pktsetup %E{MAJOR}:%E{MINOR}"
ACTION=="remove", SUBSYSTEM=="block", ENV{ID_CDROM}=="1", RUN+="/usr/sbin/pktsetup -d %E{MAJOR}:%E{MINOR}"
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